A200861 - OEIS

A200861

Prime factors of 10^100 - 1.

3, 3, 11, 41, 101, 251, 271, 3541, 5051, 9091, 21401, 25601, 27961, 60101, 7019801, 182521213001, 14103673319201, 78875943472201, 1680588011350901

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OFFSET

1,1

COMMENTS

Is this sequence the same as "Primes p such that 10^p - 1 divides 10^(10^100) - 10"?

LINKS

Eric Weisstein's World of Mathematics, Googol

MAPLE

sort(map(i-> i[1]$i[2], ifactors(10^100-1)[2]))[]; # Alois P. Heinz, Jan 27 2023

MATHEMATICA

Join[{3}, Transpose[FactorInteger[10^100 - 1]][[1]]]

CROSSREFS

Subsequence of A178070 except for 3.

KEYWORD

fini,full,nonn

AUTHOR

EXTENSIONS

Name changed by T. D. Noe and Arkadiusz Wesolowski, Nov 29 2011

STATUS

approved